Pickling-tank construction



April 21, 1925` K R. C.,HOPKINS PICKLING TANK CONSTRUCTION 2Sheets-Sheet 2 Filed June 10. 1924 31a/vanto@ Patented Apr. 21, 1925.

ROBERTY C. .-HOPKINS, QF ALLIANCEUOHIQ rrKLING-TANK CONSTRUCTIONApplication filed 'June 10,' 1924:*serial'-No.-'719,121s

To @ZZ 'who/m #may conce/ra.' n

Be itV known thatfl, .Renn'r' G; Horkrns, a citizen of the 'UnitedStates,fres1d1ng at Alliance, -in'lthe county of Stark and 'State' ofOhio, have'inventedcertainnew and useful Improvements in Pickling-TankConstructions, of which the following is a specilication.

The invention relates to improvements in acid tanks and moreparticularly to a tank adapted to contain sulphuric or hydrochloric acidfor pickling metal sheets and barsA Tanks of this character are usuallymade of heavy wood timbers secured together by bolting or the like, anddifliculty is eXperienced in making tightly sea-led ends, and also inthe breaking or destruction of the end walls by the endwise ramming ofbars, sheets and the like being pickled in the tank.

The objects of the invention are to provide a tank of this character inwhich the side and bottom walls are formed ot wood and the end walls otacid resisting meta-l; each end wall being provided with flanges towhich the wooden side and bottom walls of the tank are bolted orotherwise connected, these flanges being split or slotted at theircorners to permit expansion and contraction of the metal end plates, arib being formed upon each flange for engagement with correspondinggrooves in the wooden side and bottom walls; a wooden wedge beingprovided at each corner of the end wall to prevent leaking.

The above and other objects may be attained by constructing the tank inthe manner illustrated in the acconipanying drawings, in which- Figure 1is an end view of an acid tank embodying the invention, a portion of onecorner of the timbers being broken away;

Fig. 2, a section on the line 2--2, Fig. 1;

Fig. 3, an enlarged, sectional view ot' one corner of the tank;

Fig. 4t, a section on the line 1 -4, Fig. l; and

Fig. 5, a detached perspective view of one of the metal end walls.

Similar numerals refer to similar parts throughout the drawins.

Each end wall is indicated generally at l and is formed ot a singleplate of acid resisting metal, such as a copper-tin-lead-nickle alloy orthe like.

Outwardly disposed, angular flanges 2 and 3 respectively are formeduponthef'side:VE

a-nd'bottom edges of'each plate and providedwith spaced open-ings4,bymeans'of vwhich 'the side' andbottointimbers 5 and i6 respectively areconnectedA to the flanges'fas by the bolts 7.

As illustrated at 8 in Figs. 1 and 3, each of the flanges 2 and 3terminates in an any gular cut-out portion at the lower corners of theplate, and as best shown in Fig. 5, the flanges 2 and 3 are notconnected at their intersections, a narrow slot 9 separating` theflanges at this point.

For the purpose of strengthening the end plates, the intersection,vertical and horizontal ribs 10 and 11 may be formed upon the outer faceof each plate, terminating in the side and bottom fianges 2 and 3respectively and the narrow upper flange 12. o Each of the side andbottom flanges is provided at its edge with the angular rib 13 'adaptedto enter corresponding grooves 14 in the side and bottom timbers of thetank. If desired, asphalt or other packing material may be used forsealing the joints between the flanges and the timbers.

In assembling the tank, the side and bottoni timbers are preferablygrooved upon their engaging faces as shown at 15, tongues 16 engagingthe grooves of adjacent timbers to hold the same in alignment andsealing the joints between the timbers which are tied together as by thetie bolts 17.

The timbers are connected to the flanges 2 and 3 of the end plates bythe bolts 7 and a wooden wedge 18 is driven into each corner of the endplate at the intersection ofi the corner timbers, thus closing thejoints between the corners ot the end plates and the timbers.

lith this construction a liquid tight tank l is provided, the slots 9 atthe intersection of the side and bottom flanges upon the end platespermitting for expansion and contraction of the metal end plates,without loosening the oints of the timbers, while the wooden wedge 18 ateach corner of the end plate forms a liquid tight seal at this point,permitting for expansions and contraction of the end plates. f

Since the ends of the tank are formed ot acid resisting metal, tightlysealed as above described and of sufficientstrength to prevent breakingor destruction of' the same by the endwise ramming of bars or sheetsbeing pickled in the tanks, it will be seen that the difficulties commonin acid tanks now in general use are overcome.

I claim:

l. An acid tank including metal end Walls provided with angular flangesat their side and bottom edges, the llanges being separated from eachother` at their ends, and Wooden side and bottom Walls connected to saidflanges.

2. An acid tank including metal end Walls provided with angular flangesat their side and bottom edges, said flanges having angular ribs attheir edge portions, and

Wooden side and bottom Wallsconnected to said flanges and having groovesto receive said ribs.

3. An acid tank including metal end walls provided with angular flangesat their side and bottom edges, the corners of the metal end Walls beingout out, Wooden side and bottom Walls connected to said flanges, andWooden Wedges located between Ithe Cut-out corners and the adjacentWooden Walls.

In testimony that claim the above, I have hereunto subscribed my name.

ROBERT C. HOPKINS.

